Buggy code:
public int symbol ; public PrimaryRepairInfo ( ) { } public DiagnoseParser . PrimaryRepairInfo copy ( ) { } } private class SecondaryRepairInfo { public int code ; public int distance ; public int bufferPosition ; public int stackPosition ; public int numDeletions ; public int symbol ; boolean recoveryOnNextStack ; } private class StateInfo { int state ; int next ; public StateInfo ( int state , int next ) { } } public DiagnoseParser ( Parser parser , boolean isDiet , int firstToken ) { } private ProblemReporter problemReporter ( ) { } private void reallocateStacks ( ) { } public void diagnoseParse ( ) { } private DiagnoseParser . RepairCandidate errorRecovery ( int error_token , boolean forcedError ) { } private DiagnoseParser . RepairCandidate primaryPhase ( int error_token ) { } private int mergeCandidate ( int state , int buffer_position ) { } private DiagnoseParser . PrimaryRepairInfo checkPrimaryDistance ( int [ ] stck , int stack_top , DiagnoseParser . PrimaryRepairInfo repair ) { } private DiagnoseParser . RepairCandidate primaryDiagnosis ( DiagnoseParser . PrimaryRepairInfo repair ) { } private int getTermIndex ( int [ ] stck , int stack_top , int tok , int buffer_position ) { } private int getNtermIndex ( int start , int sym , int buffer_position ) { } private boolean isBetterSymbol ( int symbol , int actualSymbol ) { } private int misspell ( int sym , int tok ) { } private DiagnoseParser . PrimaryRepairInfo scopeTrial ( int [ ] stck , int stack_top , DiagnoseParser . PrimaryRepairInfo repair ) { } private void scopeTrialCheck ( int [ ] stck , int stack_top , DiagnoseParser . PrimaryRepairInfo repair , int indx ) { } private boolean secondaryCheck ( int [ ] stck , int stack_top , int buffer_position , int distance ) { } private DiagnoseParser . RepairCandidate secondaryPhase ( int error_token ) { } private DiagnoseParser . SecondaryRepairInfo misplacementRecovery ( int [ ] stck , int stack_top , int last_index , DiagnoseParser . SecondaryRepairInfo repair , boolean stack_flag ) { } private DiagnoseParser . SecondaryRepairInfo secondaryRecovery ( int [ ] stck , int stack_top , int last_index , DiagnoseParser . SecondaryRepairInfo repair , boolean stack_flag ) { } private void secondaryDiagnosis ( DiagnoseParser . SecondaryRepairInfo repair ) { } private int parseCheck ( int [ ] stck , int stack_top , int first_token , int buffer_position ) { } private void reportError ( int msgCode , int nameIndex , int leftToken , int rightToken ) { } private void reportError ( int msgCode , int nameIndex , int leftToken , int rightToken , int scopeNameIndex ) { } private void reportPrimaryError ( int msgCode , int nameIndex , int token , int scopeNameIndex ) { String name ; if ( nameIndex >= 0 ) { name = Parser . name [ nameIndex ] ; } else { name = DiagnoseParser . EMPTY_STRING ; } int errorStart = lexStream . start ( token ) ; int errorEnd = lexStream . end ( token ) ; int currentKind = lexStream . kind ( token ) ; String errorTokenName = Parser . name [ Parser . terminal_index [ lexStream . kind ( token ) ] ] ; char [ ] errorTokenSource = lexStream . name ( token ) ; switch ( msgCode ) { case DiagnoseParser . BEFORE_CODE : problemReporter ( ) . parseErrorInsertBeforeToken ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName , name ) ; break ; case DiagnoseParser . INSERTION_CODE : problemReporter ( ) . parseErrorInsertAfterToken ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName , name ) ; break ; case DiagnoseParser . DELETION_CODE : problemReporter ( ) . parseErrorDeleteToken ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName ) ; break ; case DiagnoseParser . INVALID_CODE : if ( ( name . length ( ) ) == 0 ) { problemReporter ( ) . parseErrorReplaceToken ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName , name ) ; } else { problemReporter ( ) . parseErrorInvalidToken ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName , name ) ; } break ; case DiagnoseParser . SUBSTITUTION_CODE : problemReporter ( ) . parseErrorReplaceToken ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName , name ) ; break ; case DiagnoseParser . SCOPE_CODE : StringBuffer buf = new StringBuffer ( ) ; for ( int i = Parser . scope_suffix [ ( - nameIndex ) ] ; ( Parser . scope_rhs [ i ] ) != 0 ; i ++ ) { buf . append ( Parser . name [ Parser . scope_rhs [ i ] ] ) ; if ( ( Parser . scope_rhs [ ( i + 1 ) ] ) != 0 ) buf . append ( '<seq2seq4repair_space>' ) ; } if ( scopeNameIndex != 0 ) { problemReporter ( ) . parseErrorInsertToComplete ( errorStart , errorEnd , buf . toString ( ) , Parser . name [ scopeNameIndex ] ) ; } else { problemReporter ( ) . parseErrorInsertToCompleteScope ( errorStart , errorEnd , buf . toString ( ) ) ; } break ; case DiagnoseParser . EOF_CODE : <START_BUG> problemReporter ( ) . parseErrorUnexpectedEOF ( errorStart , errorEnd ) ; <END_BUG> break ; case DiagnoseParser . MERGE_CODE : problemReporter ( ) . parseErrorMergeTokens ( errorStart , errorEnd , name ) ; break ; case DiagnoseParser . MISPLACED_CODE : problemReporter ( ) . parseErrorMisplacedConstruct ( errorStart , errorEnd ) ; break ; default : if ( ( name . length ( ) ) == 0 ) { problemReporter ( ) . parseErrorNoSuggestion ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName ) ; } else { problemReporter ( ) . parseErrorReplaceToken ( errorStart , errorEnd , currentKind , errorTokenSource , errorTokenName , name ) ; } break ; } } private void reportSecondaryError ( int msgCode , int nameIndex , int leftToken , int rightToken , int scopeNameIndex ) { } public String toString ( ) { } }

Fix:
problemReporter ( ) . parseErrorUnexpectedEnd ( errorStart , errorEnd ) ;